https://illsv.com/Recent content on Illia Losiev — Technical Lead & Software EngineerHugoen-USSun, 13 Sep 2026 00:00:00 +0300https://illsv.com/case-studies/ai-agent-platform/Sun, 13 Sep 2026 00:00:00 +0300https://illsv.com/case-studies/ai-agent-platform/How a multi-tenant Rails SaaS product moved from one-off AI interactions to a platform of bounded assistants with routing, shared tools and evaluation infrastructure — and what was traded to get there.https://illsv.com/work/ai-agent-platform/Mon, 01 Jan 0001 00:00:00 +0000https://illsv.com/work/ai-agent-platform/Architected and own the production AI agent platform inside a multi-tenant Rails SaaS product — the assistants, routing, tooling, conversation state and evaluation infrastructure that turn LLM calls into dependable product workflows.https://illsv.com/work/booking-sync/Mon, 01 Jan 0001 00:00:00 +0000https://illsv.com/work/booking-sync/Owned the architecture and implementation of the Airbnb integration for a hospitality platform: keeping bookings consistent between the product and external property-management systems.https://illsv.com/work/payment-platform/Mon, 01 Jan 0001 00:00:00 +0000https://illsv.com/work/payment-platform/Led the development of a SaaS payment platform from the ground up as Tech Lead — technical planning, engineering workflows and release coordination.https://illsv.com/work/crawling-platform/Mon, 01 Jan 0001 00:00:00 +0000https://illsv.com/work/crawling-platform/Core architecture, large-scale web crawlers and crypto-exchange integrations for a data-heavy platform, over five years of growth and production hardening.